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United States Patent | 6,149,311 |
Gabelli ,   et al. | November 21, 2000 |
A rolling element bearing having inner and outer rings and a plurality of rolling elements where one, two or at least one but not all of the rolling elements of the plurality of rolling elements is harder than the other of the plurality of rolling elements and harder than the rings.
Inventors: | Gabelli; Antonio (Ijsselstein, NL); Veenhuizen; Piter Abraham (Goirle, NL); De Vries; Gerardus (Nieuwegein, NL) |
Assignee: | SKF Industrial Trading & Development Company, B.V. (Nieuwegen, NL) |
Appl. No.: | 974807 |
Filed: | November 20, 1997 |
Nov 09, 1994[NL] | 9401873 |
Current U.S. Class: | 384/491; 384/492; 384/907.1 |
Intern'l Class: | F16C 033/32 |
Field of Search: | 384/491,492,907.1 |
3097897 | Jul., 1963 | Taylor | 384/492. |
3425759 | Feb., 1969 | Schwarzschild | 384/491. |
3574425 | Apr., 1971 | Johnson et al. | 384/491. |
3764188 | Oct., 1973 | Suska | 384/463. |
4634300 | Jan., 1987 | Takebayashi et al. | 384/492. |
4872771 | Oct., 1989 | Ueno et al. | 384/492. |
4966552 | Oct., 1990 | Gonser | 384/492. |
5114886 | May., 1992 | Tsukada | 384/907. |
5456008 | Oct., 1995 | Hugon | 384/491. |
Foreign Patent Documents | |||
0238725 | Sep., 1987 | EP. | |
0 304 872 | Mar., 1989 | EP. | |
2479369 | Oct., 1981 | FR. | |
2511120 | Sep., 1976 | DE. | |
2 074 255 | Oct., 1981 | GB. |